Shock-absorber.



G. W. BOLTON, JR.

SHOGK AB$0RBER. APILIOATION FILED DEO.15, 1906.

Patented July 12,1910.

2. SHEETS-SHEET 1.

FIG" I WITNESSES IHVEHTOF? '6@ary0'/V- iiozban J1.

ATT'Ys.

GEORGE W. BOLTON, JR, 0? DETROIT, MICHIGAN.

SHOCK-ABSORBER.

Specification of Letters Patent.

Patented July 12, 1910.

Application filed December 15, 1906. Serial No. 348,024.

To all whom it may concern:

Be it known that I, GEORGE W. BOLTON, J r., a citizen of the UnitedStates of America, residing at Detroit, in the county of Wayne and Stateof Michigan, have invented certain new and useful Improvements inShock-Absorbers, of which the following is a specification, referencebeing had therein to the accompanying drawings.

The invention relates generally to shock absorbers especially designedfor use in connection with vehicles for alleviating any undue strain onthe springs, and reducing the rebound of the vehicle body when travelingover rough roads or passing over obstructions or ruts in .the road.

It consists in the novel construction thereof and in the peculiararrangement and combination of the parts, as will be more fullyhereinafter set forth.

In the drawings, Figure l is a perspective view of my improved shockabsorber applied to a vehicle; Fig. 2 is a vertical central sectiontherethrough; and Fig. 3 is a similar section taken at right angles toFig. 2.

. In the drawings thus briefly described, A

designates the usual body of a vehicle of any and B the supportingspring" construction, therefor, the members constituting relativelymovable abutments.

these abutments is the shock absorber, com- %osed of two relativelyreciprocal members E, connected to the abutments, as hereinafter setforth. The member D is preferably in the form of a casing, in thisinstance rigidly attached ;to the vehicle body by means of cars a andbolts 6. The casing is apertured at its top, in which is fitted athreaded plug F having an inner concave face 7. The lower end of thecasing is provided with an opening g, through which projects and extendsupwardly within the casing the complementary member of the shockabsorber, preferably in the form of a plunger. In construction, theplunger comprises a body section it, preferably of uniform diameter to aoint, as 71, near its free end. Beyond this point the body is enlarged,so as to form extensions, as j, which pro ject laterally beyond the bodyproper, as plainl indicated in Fig. 2. The opposite end 0 the-plungertermmates in a threaded shank 70, which is attached to the spring B bymeans of a plate Z, secured to the spring by the usual spring clips mand nuts 0, the shank extending through the plate as lndi-Intermediatecated in Fig. 1, and the nuts serving to provide anadjustable connection, for a purpose hereinafter set forth.

Within the casing D described are two leaf springs G, secured at theirlower ends by means of pins 72 to the casing, and arranged upon oppositesides of the plunger, as shown in Fig. 2. These springs are so fashionedthat they will have preferably no material bearing against the main bodyof the plunger, but will be depressed or flattened by the enlarged orhead portion thereof as it is drawn downwardly within the casing.

Intermediate the upper or headed end of the plunger and the casing topis a yielding abutment H, in this instance in the form of a rubberbumper, the latter being carried preferably by the plunger, and adaptedat times to abut against the concave face f of the plug, previouslydescribed.

I represents a stop pin extending through and upon opposite sides of theplunger, and serves to limit its extreme downward movement, the pin endsbeing adapted to strike against the lower end of the casing, in whichthe plunger reciprocates.

In operation, the shock absorber being applied to the vehicle in themanner described, the proper adjustment is effected by means of theadjustable connection between the plunger and the supporting spring ofthe vehicle to bring the laterally projecting portions or enlargementupon the plunger body in close proximity to the leaf springs, or incontact therewith, this position being the normal one that the partsassume in ordinary travel. Upon the downward move ment of the body,caused by striking an obstruction or rut, a relative reciprocation iseffected between the shock absorber parts, the enlarged or headedportion of the plunger passing upwardly within the casing to near thetop. Upon the reaction of the spring, the vehicle body moves upwardly,causing the springs within the casing to be compressed by the plunger,as previously described, thus retarding the reciprocation and producingthe desired result of relieving the spring and reducing the jolt. Ininstances where downward movement of the vehicle body is considerable,the upward reciprocation of the lunger is retarded by means of the yieling abutment H, the buffer striking in extreme instances the plug in thecasing described.

The opening in the casing top closed by the plug F is of sufficient sizeto permit of the insertion or withdrawal of the plunger within thecasing, and the pins 7) are detachable. -By this construction, all ofthe parts of the shock absorber may be conveniently removed for repair,replacement, or cleans- Attention is directed to the fact that by reasonof the peculiar construction of the shock absorber, either of thereciprocatlng members, i. e. the casing or the plunger, may be attachedto the vehicle body, or the spring, which is a desirable feature, as insome instances the application of the box or casing to the body, or tothe sprlng, 1s not ractlcal. Furthermore, it Wlll be understood thateither of the reciprocating members of the absorber may be attached tothe axle, if desired, in preference to the sprlng.

What I claim as my invention is,--:

1. A shock absorber, comprising a casing, a plunger therein havingalateral pro ection, a resilient member within the casing in the path ofthe plunger projection, and a yielding abutment intermediate the casingand the plunger end.

2. In a shock absorber, the combination with a casing and a headedplunger therein arranged for relative reciproca'tory movement, of aresilient member inclosed in said casing and hearing at one end againstthe side thereof and arranged to frictionally engage the head of saidplunger on the reciprocation of the casing and plunger.

3. In a shock absorber, the combination with a casing and a headedplunger therein arranged for relative reciprocatory movement, ofresilient member interposed between the plunger and the .casing side,and having a constant bearing on the casing side and arranged tofrictionally engage the plunger head at diiferen't points in thereciprocation thereof.

4. In a shock absorber, the combination with a casing having aperturesin both ends, and a headed plunger passing through one of said aperturesand arranged for relative reciprocatory movement, of meansforfrictionally resisting the relative movement of the two in onedirection, a removable plug for the other aperture in said casing and ayielding abutment on the lunger head arranged to engage with sai plug.

'5. In a shock absorber, the combination with a casing and a headedplunger therein arranged for relative reciprocatory movement, ofresilient means for frictionally resisting said movement, a yieldingabutment plunger for engaging the casing to form a stop for limitingsaid movement in the opposite direction.

6. In a shock absorber, the combination with a casing, of a headedplunger therein arranged for relative reciprocatory movement, and aresilient member inter osed between the lunger and the wall 0 the easingadapte upon relative reciprocation of the casing and plunger to have aprogressively increasing frictional sliding engagement with the plunger.

7. The combination with relatively movable abutments, of a shockabsorber including a casing connected to one of said abutments, aresilient member anchored within the casing, a head connected to theother abutment positioned within the casing for relative oscillatorymovement, and adapted to have a progressively increasing frictionalengagement with said resilient member upon relative movement of theabutments.

8. The combination with relatively movable abutments, of a shockabsorber comprising a casing connected to one of said abutments, aplurality of leaf springs having their opposite ends in engagement withthe casing, a portion of each sprlng intermediate its ends being spacedfrom the casing, a head connected to the other abutment positionedwithin the casing for relative oscillatory movement, and adapted tofrictionally engage the intermediate portions of the springs.

9. The combination with relatively movable abut-ments, of a shockabsorber comprising a pair of spaced independent leaf springs, meanscarried by one of said abutments to which one end of each spring isanchored, means engaging the opposite end of the springs for limitingthe spreading movement of the latter, the last-mentioned ends of thesprings being arranged for relative longitudinal travel in. relation toeach other and to the said last-mentioned means, a head carried by theother abutment positioned between said springs and adapted upon relativemovement of the abutments to have a progressively increasing frictionalengagement with the springs.

In testimony whereof I alfix my signature in presence of two witnesses.

GEORGE W. BOLTON, J R.

WVitnesses:

. AMELIA WILLIAMs, JAMns P. BARRY.

